Gun-leveling device

ABSTRACT

A handgun and rifle barrel device; said barrel comprising a cylinder with a bore with trapezoidal slots in predetermined positions and of predetermined proportions so that a torque reaction is induced at the discharge end of a gun barrel to prevent &#39;&#39;muzzle jump,&#39;&#39; together with an induced anti-recoil action and reduction of noise and blowback of hot gases.

11] 3,808,943 [45] May 7, 1974 OTHER PUBLICATIONS Roettinger, Push Back or Flip Up, The American Rifleman, pages 54 and 55, May 1954.

Primary ExaminerSamuel F einberg Assistant ExaminerC. T. Jordan Attorney, Agent, or FirmI-Iarness, Dickey & Pierce [57] ABSTRACT A handgun and rifle barrel device; said barrel comprising a cylinder with a bore with trapezoidal slots in predetermined positions and of predetermined proportions so that a torque reaction is induced at the discharge end of a gun barrel to prevent muzzle jump,

GUN-LEVELING DEVICE Inventor: Larry Kelly, 34341 Groesbeck Hwy., East Detroit, Mich.

Filed: Apr. 27, 1972 Appl. No.: 247,956

US. Cl. 89/14 C, 42/76 R Int. F4lf l7/l2, F4lc 21/18 Field of Search...................... 42/76 R; 89/14 C References Cited UNITED STATES PATENTS United States Patent Kelly together with an induced anti-recoil action and reduction of noise and blowback of hot gases 10 Claims, 5 Drawing Figures n a MT Cutts, Cutts, Jr...... Lance.......... Sweetman .llllll.

GUN-LEVELING DEVICE BACKGROUND OF THE INVENTION This invention relates to improvements in the slotting of gun barrels so as to reduce recoil and jumping of the firearm. Previous attempts, such as the anti-recoil gun barrel of John F. Mutter, U.S. Pat. No. 2,916,970, use a series of small rearwardly inclined drilled holes to produce a similar effect but the same have resulted in blow back of hot discharged gases toward the operator of the firearm and a nozzling of the gases resulting in increased noise.

SUMMARY It is the primary object of the present invention to provide a slotted gun barrel which will substantially prevent pistol or rifle jump without discharge of hot gases and flame either at the operator or those standing nearby.

It is another object of the present invention to eliminate in part recoil of the firearm with minimal blowback and a reduction in sonic waves with attendant noise.

Another object is to improve the accuracy of the firearm by eliminating flinching by the operator due to muzzle jump and recoiling.

Still another object is to allow increased firing speed for greater fire power by keeping the gun barrel leveled on target for repetitive shooting.

For further objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing(s):

DESCRIPTION FIG. I is a fragmentary perspective view of a gun barrel embodying the features of the present invention.

FIG. 2 is a fragmentary longitudinal section taken on Line 22 of FIG. 1.

FIG. 3 is a cross section taken on Line 3-3 of FIG. 2.

FIG. 4 is a fragmentary view gun barrel substantially perpendicular to Line 4-4 of FIG. 3.

FIG. 5 is a front view of the gun barrel showing electrodes in place forming the slots employed in this invention.

Referring now to the accompanying drawing in more detail, particularly FIGS. 1-4 thereof, the gun barrel is designated generally by the reference numeral including the bore 12 and front sight 13.

The muzzle or front end of the barrel 10 is provided at the top with a radially disposed trapezoidal slot 11 on either side of the sight 13, said slots 11, extending through to the bore 12, and on the other side of the barrel disposed on radials approximately 30 from the upper centerline of the barrel 10 and communicating with the gas chamber of the gun.

In operation, after firing of the gun, the exploded gases expand in the barrel until reaching the slots 11 in the barrel 10 where a portion of the gases escape in an upward direction with respect to the barrel 10. The slots 11 being at the top of the muzzle end at the barrel 10, cause a reaction force tending to depress the muzzle. The result of this torque is to counteract the force set up by the recoil at the barrel 10 above the line of support. The forward motion of the exploded gases striking the forward portion of the trapezoidal slots 11 unexpectedly results also in inducing a reaction force directed forward against the recoil force. It has been found that the cross-sectional area of slots 11 must be equal to or greater than the area of the bore 12 in order to prevent choking or nozzling of the exploded gases resulting in acceleration of the gases with attendant increase in noise levels and flame directed at the operator or others nearby.

Referring to FIG. 5, the electrodes 20 are shown in position on the barrel 10. The electrodes 20 are connected to a low voltage high amperage source; the barrel to the opposite pole of the source. The gun itself is submerged in a non-conducting fluid to cool the gun barrel and to rinse away particles. This process is commonly known as electrical discharge machining or EDM. It has been found by the present inventor that' EDM eliminates burrs left by commonly used procedures such as milling or drilling and consequently to reblueing or replating is required or lapping the surface to remove burrs. This reduces the cost of producing this invention by approximately one half.

It further has been found in tests that the desired configuration with slots which collectively equal in area the area of the muzzle bore cross section or are greater than said area, substantially reduces noise of the firing and results in up to a 35 percent reduction in muzzle jump and seven percent reduction in recoil.

I claim:

1. An apparatus for reducing muzzle jump of a firearm having a barrel section defining a substantially uniform diameter bore through which a projectile travels under the influence of an explosive material,

said apparatus comprising at least two passages formed directly within the firearm barrel section and communicating the bore with the outer periphery of the firearm barrel and adapted to vent to the atmosphere at least a portion of the gases produced by the explosive material upon firing of the firearm,

said passages being non-mechanically formed in the barrel and arranged one on each side of an imaginary vertical plane extending longitudinally of the barrel and lying along the axis of the bore, said passages further being arranged above an imaginary horizontal plane extending longitudinally of the barrel and lying along said axis of the bore,

said passages being of substantially uniform crosssectional size and shape and terminating at their inner ends in an unburred and non-counterbored portion of the firearm bore so as to permit said gas venting without in any way reducing the ballistic characteristics of the firearm.

2. The invention as set forth in claim 1 wherein said passages are of a generally trapezoidal shape.

3. The invention as set forth in claim 1 wherein said passages are oriented at approximately 30 angles from said imaginary vertical plane.

4. The invention as set forth in claim 1 wherein the total cross-sectional area of said passages is approximately equal to the cross-sectional area of the bore.

5. The invention as set forth in claim 2 wherein said trapezoidal-shaped passages have spaced parallel sides of major and minor lengths, and wherein said major length side of each passagefjs disposed more closely adjacent said imaginary vertical plane than said minor length sides.

6. In combination with a firearm barrel having a substantially uniform diameter bore of predetermined standard cross-sectional caliber and thereby adapted for use in firing projectiles of a corresponding caliber,

tract from the normal and expected ballistic characteristics of the firearm barrel which would be attained in the absence of such ports.

7. The invention as set forth in claim 6 wherein said ports have at least one relatively straight side which extends upwardly and forwardly of the axis of the bore.

8. The invention as set forth in claim 7 wherein said ports are arranged approximately 30 from an imaginary vertical plane extending through the axis of the bore.

9. The invention as set forth in claim 6 wherein the total cross-sectional area of said ports is approximately equal to the cross-sectional area of the bore.

10. The invention as set forth in claim 6 wherein said ports are of a general trapezoidal shape and have spaced parallel sides of major and minor lengths. 

1. An apparatus for reducing muzzle jump of a firearm having a barrel section defining a substantially uniform diameter bore through which a projectile travels under the influence of an explosive material, said apparatus comprising at least two passages formed directly within the firearm barrel section and communicating the bore with the outer periphery of the firearm barrel and adapted to vent to the atmosphere at least a portion of the gases produced by the explosive material upon firing of the firearm, said passages being non-mechanically formed in the barrel and arranged one on each side of an imaginary vertical plane extending longitudinally of the barrel and lying along the axis of the bore, said passages further being arranged above an imaginary horizontal plane extending longitudinally of the barrel and lying along said axis of the bore, said passages being of substantially uniform cross-sectional size and shape and terminating at their inner ends in an unburred and non-counterbored portion of the firearm bore so as to permit said gas venting without in any way reducing the ballistic characteristics of the firearm.
 2. The invention as set forth in claim 1 wherein said passages are of a generally trapezoidal shape.
 3. The invention as set forth in claim 1 wherein said passages are oriented at approximately 30* angles from said imaginary vertical plane.
 4. The invention as set forth in claim 1 wherein the total cross-sectional area of said passages is approximately equal to the cross-sectional area of the bore.
 5. The invention as set forth in claim 2 wherein said trapezoidal-shaped passages have spaced parallel sides of major and minor lengths, and wherein said major length side of each passage is disposed more closely adjacent said imaginary vertical plane than said minor length sides.
 6. In combination with a firearm barrel having a substantially uniform diameter bore of predetermined standard cross-sectional caliber and thereby adapted for use in firing projectiles of a corresponding caliber, an apparatus for reducing muzzle jump normally produced upon firing a projectile through the bore under the influence of an explosive material, said apparatus comprising at least two non-mechanically formed gas ports located directly within the barrel and extending between the periphery of said bore and the outer periphery of said barrel, said ports being generally symmetrically oriented within said Barrel and terminating at their innermost ends directly within a portion of the bore which is of the standard predetermined cross-sectional caliber so as to in no appreciable way detract from the normal and expected ballistic characteristics of the firearm barrel which would be attained in the absence of such ports.
 7. The invention as set forth in claim 6 wherein said ports have at least one relatively straight side which extends upwardly and forwardly of the axis of the bore.
 8. The invention as set forth in claim 7 wherein said ports are arranged approximately 30* from an imaginary vertical plane extending through the axis of the bore.
 9. The invention as set forth in claim 6 wherein the total cross-sectional area of said ports is approximately equal to the cross-sectional area of the bore.
 10. The invention as set forth in claim 6 wherein said ports are of a general trapezoidal shape and have spaced parallel sides of major and minor lengths. 